Ramanath Parimi
2

A supernova simply is the explosion of a star. Since stars are the largest bodies in the universe, this explosion is the largest in the space. It happens when there is a change in the core of the star. This change can happen in two ways -


  • Have you seen two companion stars that orbit the same point? If one of these two, a carbon hydrogen white dwarf (star at the end of its life), steals matter from other star, it gets too much of it that it can handle. This causes the star to explode resulting Supernova.
  • Second is when star's life has expired. At the end of a star's lifetime, it runs out of nuclear fuel. Then some of its mass flows to its centre. Then the gravitational force increases at the core, which it cannot withstand. Eventually the core collapses, causing the Supernova.


When the supernova happens, there will be a sudden bright light which looks like a new star. It would take this star days, weeks, months or years to fade way  depending on the size of the explosion.


Supernovas happen in every galaxy, including our milky way. Interestingly, it is difficult to observe them in our own galaxy because the dust blocks our sight. The structure which gets generated after the explosion in space is called a Supernova remnant. Search for these in Google. They look absolutely stunning as if the cosmic being showing his painting artistry in the largest canvas, which is space.



Take a look at this one for instance -



Image - https://s.hswstatic.com/gif/supernova-622x415.jpg

Ref - https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-a-supernova.html



Manomay Shravage
1

A supernova is basically the ending of a group of stars or the beginning of a new solar system. The sun creates many elements in its lifetime but creating iron is its death wish.

When the sun creates iron the core collapses and the gravitational force of the sun causes a brilliant spark of light that can be seen for millions of miles and the sound can be heard too.

Supernovae are very important for the galaxy as they make new stars and planets.